Replaceable blade scissors



Oct. 13, 1970 P. PACITTI/ 3,533,162

REPLACEABLE BLADE SCISSORS Filed Dec. 27, 1968 FIG. 2 64b 3,20

74 2a 32 580 44b I ([280 f l8 Q 541, I 260 FIG 3 INVENTOR PETER PACITT/ATTORNE Y United States Patent 3,533,162 REPLACEABLE BLADE SCISSORSPeter Pacitti, 1201 Caldwell Ave., Cherry Hill, NJ. 08034 Filed Dec. 27,1968, Ser. No. 787,483 Int. Cl. B26]: 13/04 US. Cl. 30--260 7 ClaimsABSTRACT OF THE DISCLOSURE A scissors having blades which can be easilyreplaced without disassembling the scissors. Each of the blades has abifurcated end [which fits into a recess in the inner surface of theshank of the handles of the scissors. A clamping plate fits in therecess between the bifurcated arms of the blade, and screws extendthrough the shank of the handle and are threaded into the clamping plateto clamp the clamping plate against the bifurcated arms of the blade.

The present invention relates to a replaceable blade scissors, and moreparticularly to scissors having blades which can be easily removed andreplaced without completely disassembling the scissors.

A scissors having replaceable blades is often desirable in order topermit blades used for different purposes to be used with a singlehandle, or to permit replacement of broken blades. Such scissors must becapable of rigidly clamping the blades to the handles of the scissors,yet permit ease of releasing the blades. Also, the blades must bereleasable without completely disassembling the scissors.

It is an object of the present invention to provide a novel scissorshaving replaceable blades.

It is another object of the present invention to provide scissors havingreplaceable blades wherein the blades are rigidly secured to thehandles, yet easily releasable from the handles without completelydisassembling the scissors.

These objects are achieved by a scissors having a pair of handles whichhave mating overlapping shanks. Each of the shanks has a recess in itsmating surface. The blades have bifurcated ends which fit in therecesses in the shanks. A separate clamping plate fits in each recessbetween the bifurcated arms of the blades. Screws extend through eachshank and are threaded into the clamping plates to clamp the clampingplates against the arms of the blades, and thus secure the blades to thehandles. A pivot pin extends through the shanks of the handles and theclamping plates so as to pivotally connect the two handles and theirblades together.

For the purpose of illustrating the invention there is shown in thedrawings a form which is presently preferred; it being understood,however, that this invention is not limited to the precise arrangementsand instrumentalities shown.

FIG. 1 is a side view of the scissors of the present invention.

FIG. 2 is a sectional view taken along line 2- 2 of FIG. 1.

FIG. 3 is a sectional view taken along line 33 of FIG. 2.

FIG. 4 is an exploded perspective view of the connection between a bladeand handle of the scissors of the present invention.

Referring to the drawings, the scissors of the present invention isgenerally designated as Scissors 10 comprises a pair of handles 12 and14 pivotally connected together by a pivot pin 16, and a pair of blades18 and 20. Each of the blades is releasably connected to a separate oneof the handles 12 and 14 in the manner which will be described.

3,533,162 Patented Oct. 13, 1970 The handles 12 and 1 4 have fingerreceiving rings 22 and 24 respectively at one end, and shanks 26 and 28respectively at their other end. The handle shanks 26 and 28 have flatsurfaces 26a and 280. respectively which are in overlapping contactingrelation. Recesses 30 and 32 are provided in the flat surfaces 26a and28a respectively of the shanks 26 and 2 8. The recesses 30 and 32 extendlongitudinally along the fiat surfaces 2'64: and 28a from the free endsof the shanks 26 and 28. The shanks 26 and 28 have pivot pin holes 34and 36 respectively therethrough at the center of the recesses 30 and32. A nut 38 is secured in the pivot pin hole 36 in the shank 28, and abearing ring 40 is secured in the pivot pin hole 34 in the shank 26.Shank 26 has a pair of holes 42a and 42b extending therethrough to therecess 30. The holes 42a and 42b are arranged in longitudinal alignmentalong the shank at opposite sides of the pivot pin hole 34. Shank 218has a pair of holes 4411 and 44b extending therethrough to the recess32. The holes 440 and 44b are arranged in longitudinal alignment alongthe shank 28 at opposite sides of the pivot pin hole 36.

Rectangular clamping plates 46 and 48 are seated in the recesses 30 and32 respectively in the shanks 26 and 28. The clamping plates 46 and 48are of the same length as the recesses 30* and 32, but are narrower thanthe width of the recesses. The side edges 46a and 46b of the clampingplate 46 and the side edges 48a and 48b of the clamping plate 48 aretapered inwardly toward the surface of the respective clamping plateswhich engages the bottom of the respective recesses 30 and 32 (see FIG.3). Pivot pin receiving holes 50* and 52 extend through the center ofthe clamping plates 46 and 48 respectively. A pair of cylindrical bosses54a and 54b project from the inner surface of the clamping plate 46 atopposite sides of the hole 50, and fit in the holes 42a and 42brespectively in the shank 26 so as to properly position the clampingplate 46 in the recess 30. The bosses 54a and 54b have threaded holes56a and 56b respectively extending therethrough. A pair of cylindricalbosses 58a and 58b project from the inner surface of the clamping plate48 at opposite sides of the holes 52 and fit in the holes 44a and 44brespectively in the shank 28 so as to properly position the clampingplate 48 in the recess 32. The bosses 5 8a and 58b have threaded holes60a and 60b respectively extending therethrough.

Screws 62a and 62b extend through the holes 4 2a and 42b respectively inthe shank 26 from the outer surface of the shank, and are threaded inthe holes 56a and 56b respectively in the clamping plate 46 so as tosecure the clamping plate 46 to the shank 26. Screws 64a and 64b extendthrough the holes 44a and 44b respectively in the shank 28 from theouter surface of the shank, and are threaded in the holes 60a and 60brespectively in the clamping plate 48 so as to secure the clamping plate48 to the shank 28.

As shown in FIG. 4, the back end of the blade 18 is bifurcated toprovide a pair of spaced, parallel arms 66 and 68 extendinglongitudinally from the back end of the blade. The arms 66 and 68 fit inthe recess 30 in the shank 26 between the side edges 46a and 46b of theclamping plate 46 and the wall of the recess. As shown in FIG. 3, theinner surfaces 66a and 68a of the arms 66 and 68 are tapered to matewith the tapered side edges 46a and 46b of the clamping plate 46. Thus,when the screws 62a and 62b are tightened, the clamping plate 46 ispulled against the bottom of the recess 30 so that the side edges 46aand 46b of the clamping plate 46 engage the side edges 66a and 68b ofthe arms 66 and 68. This clamps the blade 18 tightly to the handle 12.Likewise, the back end of the blade 20 is bifurcated to provide a pairof spaced, parallel arms 70 and 72. The arms 70 and 72 fit in the recess32 in the shank 28 between the clamping plate 28 and the wall of therecess 32. The inner surfaces 70a and 72a of the arms 70 and 72 aretapered to mate with the tapered side edges 48a and 48b of the clampingplate 48. Thus, the clamping plate engages the arms 70 and 72 to securethe blade 20 to the handle 14.

The pivot pin 16 comprises a threaded shank 74 and a cylindrical head 76on the end of the shank. The shank 74 extends through the holes 50 and52 in the clamping plates 46 and 48, and is threaded into the nut 38.The head 76 fits in and engages the bearing ring 40. Thus, the pivot pin16 secures the handles 12 and 14 together, but permits pivotation of onehandle with respect to the other handle.

To release the blade 18 from the handle 12, the screws 62a and 62b areloosened to release the force of the clamping plate 46 against the arms66 and 68 of the plate 18. The blade 18 can then be pulled out of therecess 30. To replace the blade 18, the arms 66 and 68 are reinsertedinto the recess 30 and the screws 62a and 62b tightened to pull theclamping plate 46 tightly against the arms 66 and 68. The blade 20 canbe similarly released from the handle 14- by loosening the screws 64aand 64b. Thus, it can be seen that the scissors 10 of the presentinvention provides for the release and replacement of the blades withease and without completely disassembling the scissors.

The present invention may be embodied in other specific forms withoutdeparting from the spirit or essential attributes thereof and,accordingly, reference should be made to the appended claims, ratherthan to the foregoing specification as indicating the scope of theinvention.

What is being claimed is:

1. Replaceable blade scissors comprising a pair of handles having at oneend flat surfaces which are in overlapping relation, a separate recessin each of said fiat surfaces extending from the one end of therespective handle, a pair of blades, each of said blades having a pairof spaced parallel arms extending from one end thereof and fitting intoa recess in a separate one of the handles, a separate clamping plate ineach of said recesses engaging the arms of the blade which are in saidrecess, separate means extending through each of said handles andengaging the clamping plate in the recess in the handle to releasablyhold the clamping plates against the arms of the blades and secure theblades to the respective handles, and means pivotally securing thehandles together.

2. Scissors in accordance with claim 1 in which each of the handles hasa shank on the one end, and the flat surfaces are on the shanks.

3. Scissors in accordance with claim 2 in which the means releasablyholding the clamping plates against the arms of the blades comprisesseparate screws extending through holes in the shanks and threaded intoholes in the clamping plates.

4. Scissors in accordance with claim 3 in which the means pivotallysecuring the handles together comprises a pivot pin extending throughthe shanks and the clamping plates.

5. Scissors in accordance with claim 4 including two screws extendingthrough holes in each of the shanks and threaded into holes in theclamping plates, the screws in each of the shanks being positioned inlongitudinal alignment at opposite sides of the pivot pin.

6. Scissors in accordance with claim 5 in which each of the clampingplates has a pair of hubs projecting therefrom and fitting into theholes in the respective shank, and the screws are threaded into holes inthe hubs.

7. Scissors in accordance with claim 6 in which the side edges of eachof the clamping plates are tapered inwardly toward the bottom of therespective recess, the inner side edges of the arms of each blade aretapered to mate with the tapered side edges of the respective clampingplate, and the tapered side edges of the clamping plates engage thetapered side edges of the blade arms to secure the blades to thehandles.

References Cited UNITED STATES PATENTS 130,184 8/ 1872 Braithewaite30260 1,645,035 10/1927 Zeidler 30-260 2,575,861 11/1951 Bray 302602,758,372 8/1956 Gammons 30-260 ROBERT C. RIORDON, Primary Examiner J.C. PETERS, Assistant Examiner

